TPS61052

1.2 -A高功率白光LED驱动器2 - MHz的同步升压转换器，带有I2C兼容接口 1.2-A HIGH POWER WHITE LED DRIVER 2-MHz SYNCHRONOUS BOOST CONVERTER WITH I2C COMPATIBLE INTERFACE

The TPS6105x device is based on a high-frequency synchronous-boost topology with constant current sink to drive single white LEDs. The device uses an inductive fixed-frequency PWM control scheme using small external components, minimizing input ripple current.

The 2-MHz switching frequency allows the use of small and low profile 2.2-µH inductors. To optimize overall efficiency, the device operates with only a 250-mV LED feedback voltage.

The TPS6105x device not only operates as a regulated current source, but also as a standard voltage-boost regulator. This additional operating mode can be useful to supply other high-power devices in the system, such as a hands-free audio power amplifier, or any other component requiring a supply voltage higher than the battery voltage refer to .

For highest flexibility, the LED current or the desired output voltage can be programmed through an I2C compatible interface. To simplify flash synchronization with the camera module, the device offers a trigger pin FLASH_SYNC for fast LED turnon time.

When the TPS6105x is not in use, it can be put into shutdown mode through the I2C-compatible interface, reducing the input current to 0.3 µA typical. During shutdown, the LED pin is high impedance to avoid leakage current through the LED.

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Four Operational Modes

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Torch and Flash up to ILED = 1200 mA

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Voltage-Regulated Boost Converter: 4.5 V,

5 V, and 5.25 V

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Shutdown: 0.3 µlA Typical

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Total Solution Circuit Area < 25 mm2

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Up to 96% Efficiency

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I2C-Compatible Interface up to 400 kbps

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Integrated LED Turnon Safety Timer

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Zero Latency TX-Masking Input TPS61050

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Hardware Voltage Mode Selection Input

TPS61052

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Integrated ADC for LED VF Monitoring

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Integrated Low Light Dimming Mode

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LED Disconnect During Shutdown

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Open and Shorted LED Protection

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Overtemperature Protection

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Available in a 12-Pin NanoFree™ CSP and

10-Pin QFN Packaging